Was confined to the white behind closed doors, and six heroines hero. Nemu middle of classmate Ando Miyako leaves Hokari, chairman of childhood class, junior 蒔羽 Rika, English teacher Aoi Natsuki and, and, Rin midnight sun sounds the same grade. They get confused in an abnormal situation, "the voice of the mystery" as suddenly tells. "Unlocked" to go the act of setting the "keyhole" to one of the heroine becomes "to start the game now" in order to escape from this room, the hero is an "unlocked", the specified it is necessary. It is a radical and unreasonable, was an immoral content .... PoROre: Special Features: